Valve timing adjustment device
AssigneesDenso Corporation, Nippon Soken, Inc.
InventorsAkihiko Takenaka, Takayuki Inohara
Life of this patent
Estimating the term…
Abstract
A valve timing adjusting device sets an amount of phase shift of a driven shaft with respect to a drive shaft. A first hole in a first rotor forms a first track extending in order to vary its radial distance from a rotation center line. The first hole makes contact with a control member passing through the first track, on the two sides of the first hole toward which the first hole (the first rotor) rotates. A second hole in a second rotor forms a second track that extends. The second hole makes contact with the control member that passes through the second track. The first track and the second track slant toward each other in the rotation direction of the first and second rotor.
Claims17
A valve timing adjustment device provided to a transmission system for transmitting drive torque from a drive shaft of an internal combustion engine to a driven shaft for opening and closing at least one of an air intake valve and an exhaust valve, adjusting the timing at which at least one of the air intake valve and the exhaust valve opens and closes, the device comprising:
- a first rotor that rotates around a rotation centerline by the drive torque from the drive shaft;
- a second rotor that rotates around the rotation centerline together with the rotation of the first rotor and in the same direction as the first rotor so as to make the driven shaft rotate synchronously, wherein the second rotor is capable of rotating relative to the first rotor;
- and
- control means having a control member, the control means varying the radial distance of the control member from the rotation centerline,
- wherein the first rotor defines a first hole forming a first track that extends so as to vary its radial distance from the rotation centerline, and the first hole makes contact with the control member that passes through the first track, with the contact between the first hole and the control member occurring at two sides of the first hole toward which the first rotor rotates;
- the second rotor defines a second hole forming a second track extending so as to vary its radial distance from the rotation centerline, and making contact with the control member that passes through the second track, with the contact between the second hole and the control member occurring at two sides of the second hole toward which the second rotor rotates;
- and
- the first track and the second track slant toward each other along the rotational direction of the first rotor and the rotational direction of the second rotor.
A valve timing adjustment device provided to a transmission system for transmitting drive torque from a drive shaft of an internal combustion engine to a driven shaft for opening and closing at least one of an air intake valve and an exhaust valve, adjusting the timing at which at least one of the air intake valve and the exhaust valve opens and closes, the device comprising:
- a first rotor that rotates around a rotation centerline by the drive torque from the drive shaft;
- a second rotor that rotates around the rotation centerline together with the rotation of the first rotor and in the same direction as the first rotor so as to make the driven shaft rotate synchronously and that is capable of rotating relative to the first rotor;
- control means having a control member, and varying the radial distance of the control member from the rotation centerline;
- and
- energizing means for energizing the first rotor and the second rotor to advance one rotor with respect to the rotational direction, and retard the other rotor with respect to the rotational direction,
- wherein one of the first rotor and the second rotor has a first wall portion forming a first track extending so as to vary its radial distance from the rotation centerline, the first wall portion making contact with the control member that passes through the first track, with the contact occurring on the retardation side of the first track with respect to the rotational direction;
- the other rotor has a second wall portion that forms a second track extending so as to vary its radial distance from the rotation centerline, the second wall portion making contact with the control member that passes through the second track, with the contact occurring on the advancement side of the second track with respect to the rotation direction of its rotor;
- and
- the first track and the second track slant toward each other along the rotational direction of the first rotor and the rotational direction of the second rotor.
Dependencies are inferred from the claim text.